grid.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef TWINE_SCENE_GRID_H
#define TWINE_SCENE_GRID_H

#define WATER_BRICK (0xF1)

#include "common/scummsys.h"
#include "twine/parser/blocklibrary.h"
#include "twine/parser/sprite.h"
#include "twine/shared.h"

namespace Graphics {
class ManagedSurface;
}

namespace TwinE {

class ActorStruct;

struct BlockEntry {
    uint8 blockIdx = 0;
    uint8 brickBlockIdx = 0;
};
struct BrickEntry {
    int16 x = 0; //z
    int16 y = 0;
    int16 z = 0; // x
    int16 posX = 0;
    int16 posY = 0;
    int16 index = 0;
    uint8 shape = 0;
    uint8 sound = 0;
};

#define NUM_BRICKS 9000

#define SIZE_CUBE_X 64

#define SIZE_CUBE_Y 25

#define SIZE_CUBE_Z SIZE_CUBE_X

#define ISO_SCALE 512
#define SIZE_BRICK_XZ 512
#define SIZE_BRICK_Y 256
#define DEMI_BRICK_XZ 256
#define DEMI_BRICK_Y 128
// short max 32767 0x7FFF
//           32256 0x7E00
//           32000 0x7D00
#define SCENE_SIZE_MAX (SIZE_BRICK_XZ * (SIZE_CUBE_X - 1))
// short min -32768
#define SCENE_SIZE_MIN (-SIZE_BRICK_XZ * SIZE_CUBE_X)
#define SCENE_SIZE_HALF (SIZE_BRICK_XZ * SIZE_CUBE_X / 2)
#define SCENE_SIZE_HALFF (SIZE_BRICK_XZ * SIZE_CUBE_X / 2.0f)

#define MAXBRICKS 150

class TwinEEngine;

class Grid {
private:
    TwinEEngine *_engine;

    void drawColumnGrid(int32 blockIdx, int32 brickBlockIdx, int32 x, int32 y, int32 z);
    void getBrickPos(int32 x, int32 y, int32 z, int32 &_brickPixelPosX, int32 &_brickPixelPosY) const;
    void createCellingGridMap(const uint8 *gridPtr, int32 gridPtrSize);
    void createCellingGridColumn(const uint8 *gridEntry, uint32 gridEntrySize, uint8 *dest, uint32 destSize);
    void decompColumn(const uint8 *gridEntry, uint32 gridEntrySize, uint8 *dest, uint32 destSize);
    void loadGridBricks();
    void createGridMask();
    void processGridMask(const uint8 *buffer, uint8 *ptr);
    void copyMask(int32 index, int32 x, int32 y, const Graphics::ManagedSurface &buffer);

    uint8 *_brickTable[NUM_BRICKS]{nullptr};
    uint8 *_brickMaskTable[NUM_BRICKS]{nullptr};
    uint32 _brickSizeTable[NUM_BRICKS]{0};
    uint8 _brickUsageTable[NUM_BRICKS]{0};

    int32 _currentGridSize = 0;
    uint8 *_currentGrid = nullptr;
    BlockLibraryData _currentBlockLibrary;

    BrickEntry *_bricksDataBuffer = nullptr;
    int16 *_brickInfoBuffer = nullptr;
    int32 _brickInfoBufferSize = 0;

    int32 _blockBufferSize = 0;
    uint8 *_bufCube = nullptr;

    const BrickEntry* getBrickEntry(int32 j, int32 i) const;

    const IVec3 &updateCollisionCoordinates(int32 x, int32 y, int32 z);

    BlockEntry getBlockEntry(int32 xmap, int32 ymap, int32 zmap) const;

    bool shouldCheckWaterCol(int32 actorIdx) const;
public:
    Grid(TwinEEngine *engine);
    ~Grid();

    void init(int32 w, int32 h);

    const uint8 *getBlockBufferGround(const IVec3 &pos, int32 &ground);

    IVec3 _newCamera;

    IVec3 _worldCube; // WorldXCube WorldYCube

    int16 _useCellingGrid = 0;
    int16 _cellingGridIdx = 0;

    void drawOverBrick(int32 x, int32 y, int32 z);

    void drawOverBrick3(int32 x, int32 y, int32 z);

    void getSpriteSize(int32 offset, int32 *width, int32 *height, const uint8 *spritePtr);

    void centerScreenOnActor();
    void centerOnActor(const ActorStruct* actor);

    bool drawBrick(int32 index, int32 posX, int32 posY);

    bool drawSprite(int32 index, int32 posX, int32 posY, const uint8 *spritePtr);
    bool drawSprite(int32 posX, int32 posY, const SpriteData &ptr, int spriteIndex = 0);

    bool drawBrickSprite(int32 posX, int32 posY, const uint8 *spritePtr, bool isSprite);

    const BlockData *getBlockLibrary(int32 blockIdx) const;
    const BlockDataEntry* getAdrBlock(int32 blockIdx, int32 tmpBrickIdx) const;

    void copyMapToCube();

    bool initGrid(int32 index);

    bool initCellingGrid(int32 index);

    void redrawGrid();

    ShapeType worldColBrick(int32 x, int32 y, int32 z);

    ShapeType worldColBrickFull(int32 x, int32 y, int32 z, int32 y2, int32 actorIdx);

    uint8 worldCodeBrick(int32 x, int32 y, int32 z);

    inline ShapeType worldColBrick(const IVec3 &pos) {
        return worldColBrick(pos.x, pos.y, pos.z);
    }

    inline ShapeType worldColBrickFull(const IVec3 &pos, int32 y2, int32 actorIdx) {
        return worldColBrickFull(pos.x, pos.y, pos.z, y2, actorIdx);
    }
};

} // namespace TwinE

#endif